So in about 20 seconds..

Arguably one of the best fighters in the world, UFC Light-Heavyweight Champion Jon Jones, was almost defeated Saturday night in Toronto by armbar from heavy underdog, Vitor Belfort, in the main event UFC light heavyweight championship title bout, in 30 seconds.

Jon Jones eventually won the bout early in the fourth round, by submission by Americana from the crucifix position. However, at the post fight press conference, Jones' arm was in a sling and there is most likely nerve, tissue, and ligament damage through his bicep and elbow. Not bad from a challenger, Belfort, who took the fight with less than one months training camp, coming up from a lower weight class, a broken hand, an MCL Ligament tear, and keeping on at least 20 extra pounds of muscle.
Basically, the idea here is to be prepared in all aspects of what you're competing in. A blackbelt in Brazilian Jiu Jitsu under Carlson Gracie, doesn't come easily, and Vitor proved how much farther Jones has to come in this sport, and no one, not even the best fighter in the world, is immune from mistakes.